👉 A trioicous is a type of musical form that originated in the United States and is known for its combination of three different instruments. It was introduced by American composer and conductor George Gershwin, who is often credited with inventing the trioicous style. The trioicous consists of two pianos (or piano-like devices) played by a soloist or an ensemble of musicians, while the third instrument, which can be any type of stringed instrument such as violin, viola